| ID |
2237 |
| Citation |
Lakeman, T., Clague, J., Menounos, B., 2008. Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada. Quaternary Research 69: 188-200, doi: 10.1016/j.yqres.2008.01.002. |
| Organization |
Simon Fraser University; University of Northern British Columbia |
| URL |
http://couplet2.unbc.ca/pdfs/Lakeman_etal_2008.pdf |
| Abstract/Description or Keywords |
Sharp-crested moraines, up to 120 mhigh and 9 km beyond Little Ice Age glacier limits, record a late Pleistocene advance of alpine glaciers in the Finlay River area in northern British Columbia. The moraines are regional in extent and record climatic deterioration near the end of the last glaciation. Several lateral moraines are crosscut by meltwater channels that record downwasting of trunk valley ice of the northern Cordilleran ice sheet. Other lateral moraines merge with ice-stagnation deposits in trunk valleys. These relationships confirm the interaction of advancing alpine glaciers with the regionally decaying Cordilleran ice sheet and verify a late-glacial age for the moraines. Sediment cores were collected from eight lakes dammed by the moraines. Two tephras occur in basal sediments of five lakes, demonstrating that the moraines are the same age. Plant macrofossils from sediment cores provide a minimum limiting age of 10,550–10,250 cal yr BP (9230Ī50 14C yr BP) for abandonment of the moraines. The advance that left the moraines may date to the Younger Dryas period. The Finlay moraines demonstrate that the timing and style of regional deglaciation was important in determining the magnitude of late-glacial glacier advances. Cordilleran ice sheet; Fraser glaciation; Younger Dryas; late-glacial; British Columbia; Finlay River |
| Information Type |
Article |
| Regional Watershed |
Finlay River |
| Sub-watershed if known |
|
| Aquifer # |
|
| Comments |
|
| Project status |
|
| Contact Name |
|
| Contact Email |
|
